Compressor.



H. W. N. COLE.

COMPRESSOR.

APPLICATION FILED 11116.23, 1909.

Patented Feb. '7, 1911.

3 SHEETS-SHEET 1.

IIIIHIIl-llllll WITNESSES:

H. W. N. COLE. coMPRBssOB.

APPLICATION FILED AUG. 23, 1909.

983,605. Paiemea Fem, 1911.

a SHEETS-SHEET z.l

H. W. N. COLE.

COMPRESSOR.

APPLIoATIoN FILED AUG. 2s, 1909.

Qatented Feb. 7, 1911.

3 SHEETS-SHEET 3.

wx q4 INVENTOR aff/ 1, l Il BY zf ATTO EYS Q M g FIIHW W, w 1 [L A w WITNESSES:

HENRY W. N. coLE, or BROOKLYN, -NEW YORK.

COMPRESSOR.

Specication of Letters Patent.

:Patented Feb. 7, 1911.

Appueauon mea August 23, 1909. serial no; 514,085.

To all 'whom 'it may concern:

Be it known that I, HENRY W. N. COLE, a citizen of the United States of America, and a resident of Brooklyn, county of Klngs and State of New York,'have invented cer tain .new and useful Improvements in Compressors, of which the followingvis a specification, reference being had to the accompanyln'g drawings, forming a part thereof.

My invention relates to compressors, and

particularly to rotary compressors.

The object of my invention is to provide a simple form of rotary compressor which will compress fluid to a comparatively high degree without requiring thekexpenditure of an excessive amount of power; to reduce to .a minimum the clearance spaces so as to permit of a high degree of compression; to so construct and arrange the working parts as to substantially balance the resistance during the revolution of the machine; to plrovide long bearing surfaces for the moving parts so as to reduce wear to a minimum; and to provide a'structure which is easy and inexpensive to manufacture.

To these ends my invention consists. in a compressor having an annular .chamber therein, and provided with a plurality of se mental pistons mounted to travel orbitally in the chamber, together with means for imparting such orbital movements to the pistons and `at the same time to move adjacent pistons toward and away from each other endwise so las to alternately increase and decrease the area between them.

My invention also consists in many novel details of construction and combinations of parts such as will be fully pointed out hereinafter.

In order that my-invention may be fully understood, I will now proceed to describe an embodiment thereof, having reference to the accompanying` drawings illustrating the same, and will then point out the novel features in claims. g

In the drawings: Figure 1 is a view in vertical longitudinal section, the section being taken upon the plane of the line 1-1 of Fig. 2. Fig. 2 is a View in vertical transverse section, taken substantially upon theplane of the line 22 of Fig. 1. Fig. 3 is a view in central vertical transverse section through the compressor. Fig. 4 is a longitudinal section substantially upon the plane of the line 4-4 of Fig. 3. Fig. 5 is a detail sectional view upon the line 5 5 of Fig. 2. Fig. 6 is a View in central longitudinal section through a modied form of the compressor. Fig. 7 .is a transverse sectional .view thereof, taken upon the plane of the line 7-7 of Fig. 6.

Referring first to the structure shown in Figs. 1 to 5 inclusive, the casing will be' seen to be made in two parts, each part comprising a substantially cylindrical portion v10, an end. head 11, and a flange 12; studs and nuts 13 engage the two anges to unite the two`members together. The shaft 14 of the compressor is mounted in suitable bearings 15 in the casing members, the axis of the said shaft being disposed eccentrically with respect to the cylindrical portions 1010i the v casing. l

Secured fast to the shaft 14 is a central head or disk 16, the periphery whereof `is concentric with the axis of the said shaft. The eccentric space between the periphery of this head or disk and the inner bore of the cylindrical portions of the casing is filled up by an eccentric spacing piece v17, the spacing piece 17 and the head or disk 16 serving to divide the sp-ace inclosed vby the casing members into two chambers '19. These two chambers are of true annular form concentric with'the axisofthe' casing,

' and hence, 'of course, eccentric with respect to the axis of the shaft 14, a central hub 18 projecting inward from each of the end head portionsy 11 of the casing, such hubs being concentric with. the casing but eccentric with respect to the shaft l14.

Mounted within the chambers 19 are two sets of segmental piston members 21,-one set of three in the present instance being mounted in each said chamber. The segmental members of the two sets are connected together in pairs by means of pins 22, each pair including corresponding members of the two sets, the pins thereof extending across from one to the other and passing through slots 23 in the head ordisk 16 upon the shaft 14. Anti-friction bearings 24 are conveniently provided around the pins 22 for the purpose of engaging the walls of the the' head or disk 16 compels the said seg` mental pistons to rotate with the d-isk or head-that vis to say, it compels an orbital movement of the said pistons around the cham-bers 19 as the head or disk 16 rotates, but the axis ofvrotationof the'disk or head being eccentric with thepath of movement of the said segmental pistons, the said segmental pistons move away from and toward the axis of rotation of the head or disk in the revolution thereof, and in so doing are compelled to follow the path prescribed by the walls of the slots 23 ;-this, as previously stated, compels the segmental piston members successively to advance and retreat with 10 are respect to the head or disk in its revolution. fllhe rclatlve advance and retardatlon of these plston vmembers causes opemngs of varymg sizes to be formed between the ends thereof, the parts bemg so designed as to cause the ends of two pairs of the segments t-o come substantlally together at one' point i in the revolution of the machine, this space to be gradually enlarged to a maximum, and then gradually reduced until it is finally closed up again at the end vof a full revolution. I utilize this varying area for compression purposes by introducing fluid to be compressed between lthe piston heads as they are drawing apart to increase the area, and discharge the same as the heads are drawing together to reduce the area. Fluid to be compressed is admit-ted through an inlet pipe 25, thence through channels 2G formed as recesses in the inner walls of the cylinder portions 10 of the casing members, and thence through openings 27 in lining shells 28 with which the said cylindrical portions preferably provided, into the chambers 19.v

In the position in which the parts are shown in Fig. 2 of the drawings a practically full charge has just been received between the adjacent ends of two of the segmental pistons, while another charge is about to be received between the rear end of one of the said segmental pistons and the forward en d of the next one (the direction of rotation of the compressor is in the direction of the arrow of Fig. 2). As the pistons move around and the fluidv is compressed such compressed fluid is discharged through valves 29 disposed in the 'end heads 11 of the casing members. These valves permit the fluid to pass from the chambers 19 into passages 30 whence it passes through a discharge pipe into a suitable receiver. (Not shown). The valves 29 may be of any convenient form, being here shown as of the usual puppet construction, spring closed against return of the fluid.

In Figs. 6 and 7 I have shown a slightly modified structure in that but a single set of segmental pistons is employed in lieu of the i two sets employed in the construction shown in the other figures. Moreover, I have dispensed with the discharge v alves and instead of discharging lthe compressed fluid through the end heads, I have provided openings 32A therefor in the lining shell 28 similar to the inlet openings 27, the said openings communicating with a channel 33 formed as a recess in the cylindrical portion of the casing, said channel communicating with the discharge pipe 31. In this case the compressor may be said to be valveless, or, in other words, the pistons themselves act as valves, the said pistons completing their discharge after the area between the adjacent mum, just prior to the drawing in of a fresh charge as the area between the-said heads commences to increase. c

The form of compressor shown in F ig. 7 is particularly adapted for small-size machines, and I have therefore, simplified the structure by employing plain bearings instead of anti-friction bearings, and have made manyv of the parts solid instead of hollow.

It will, of course, be understood that in both cases the compressor is driven by power applied to the shaft 14. It will also be understood that by reversingv the operation above set forth and employing motive fluid under initial pressure, the compressor may be operated as a rotary engine instead of as a compressor; this, of course, is a mere inversion which is common to rotary compressors and engines.

WhatIclaim is:

1. A rotary compressor comprising a casing having a cylindrical bore and provided with a stationary end head, a rotary head in the said bore opposite the said stationary end head,'the axis of rotation of the said head being eccentric with respect to the axis of the said bore, and .a plurality of segmental pistons mounted in the said bore lbetween the said heads, the said rotary head being provided with tangential slots and the said pistons with abutments for coengagement therewith, for the purpose set forth.

2. A rotary compressor comprising a cylinder, a plurality of segmental pistons mounted concentrically within the cylinder, and a head mounted to rotate eccentrically 'with respect toc-the cylinder and pistons, the said head and pistons being provided the one with tangential slots and the other with pins for' coengagement therewith, for the purpose set forth.

3. A rotary compressor comprising a cylinder, a plurality of segment-al pistons mounted concentrically within .the cylinder, a head mounted to rotate eccentrically with respect to the cylinder and the pistons, and having. tangential slots therein, and pins heads thereof has been reduced to a mini- 'carried by the said segmental pistons, arranged to enter the said slots and to be.

Y guided thereby.

4. A rotary compressor comprising a casing, a central diaphragm, and an eccentrioally mounted rotating Web or disk lwhich divides the space inelosed by the cylinder into two annular chambers, ltwo sets of segmental pistons,-one set in each said annular eha11xher,-ineans connecting the said 10 pistons of the two sets together in pairs, said means extending through tangential slot-s in the said web or' disk.

HENRY W. N. COLE.

- Titnesses D. HoWARD HAYWOOD,

LYMAN S. ANDREWS, Jr. 

